Can't Connect To Xbox Through Router

Hi all, new around here and I'm just trying to mod my xbox and have run into a bit of a roadblock. I've searched google high and low and I have just run out of options for help.

When I connect my xbox to the router and try to connect to it through FlashFXP using a suggested default IP address (182.168.2.1?, where the ? is the port number) it will not connect. The xbox is also not showing up as a device on my router settings page, which might be normal but I'm not sure.

Does anyone have some tips for connecting to my xbox through flashFXP? Should I use a different IP address? Should I be using a user name/password? I'm at my wit's end and would really appreciate any and all help.